Gold may have lost a little of its luster recently, but this fund has had strong returns for decades. And despite recent setbacks, the fund—run by a former geologist—is ready to shine.

When Toronto-based mining company Argonaut Gold (ticker: AR.Canada) acquired a small mine in Mexico in 2009, it went unnoticed by most investors, but Joseph Foster saw the opportunity. "I'd been to the mine, and the geological potential was very good, but management at the time wasn't very good," says Foster. Under Argonaut's guidance, he believed the mine would prove profitable—and it has. Argonaut stock, meanwhile, is up nearly 130% (in U.S. dollars) since he bought it that year.